fkie_cve-2022-49016
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-10-24 18:35
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mdiobus: fix unbalanced node reference count I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0 If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak. If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "6B49AE96-FD69-40D4-A29C-DC4DB7DE3CDB",
                     versionEndExcluding: "5.15.82",
                     versionStartIncluding: "5.14",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "D6D56E90-F3EE-413D-B3E2-B518932F0C7D",
                     versionEndExcluding: "6.0.12",
                     versionStartIncluding: "5.16",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
                     matchCriteriaId: "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*",
                     matchCriteriaId: "17F0B248-42CF-4AE6-A469-BB1BAE7F4705",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*",
                     matchCriteriaId: "E2422816-0C14-4B5E-A1E6-A9D776E5C49B",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*",
                     matchCriteriaId: "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*",
                     matchCriteriaId: "35B26BE4-43A6-4A36-A7F6-5B3F572D9186",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*",
                     matchCriteriaId: "3FFFB0B3-930D-408A-91E2-BAE0C2715D80",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*",
                     matchCriteriaId: "8535320E-A0DB-4277-800E-D0CE5BBA59E8",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdiobus: fix unbalanced node reference count\n\nI got the following report while doing device(mscc-miim) load test\nwith CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled:\n\n  OF: ERROR: memory leak, expected refcount 1 instead of 2,\n  of_node_get()/of_node_put() unbalanced - destroy cset entry:\n  attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0\n\nIf the 'fwnode' is not an acpi node, the refcount is get in\nfwnode_mdiobus_phy_device_register(), but it has never been\nput when the device is freed in the normal path. So call\nfwnode_handle_put() in phy_device_release() to avoid leak.\n\nIf it's an acpi node, it has never been get, but it's put\nin the error path, so call fwnode_handle_get() before\nphy_device_register() to keep get/put operation balanced.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: mdiobus: arregla el recuento de referencias de nodos desequilibrados Obtuve el siguiente informe mientras realizaba la prueba de carga del dispositivo (mscc-miim) con CONFIG_OF_UNITTEST y CONFIG_OF_DYNAMIC habilitados: OF: ERROR: pérdida de memoria, se esperaba un recuento de referencias 1 en lugar de 2, of_node_get()/of_node_put() desequilibrado - destruye la entrada cset: adjuntar un nodo superpuesto /spi/soc@0/mdio@7107009c/ethernet-phy@0 Si el 'fwnode' no es un nodo acpi, el recuento de referencias se obtiene en fwnode_mdiobus_phy_device_register(), pero nunca se ha colocado cuando el dispositivo se libera en la ruta normal. Entonces llama a fwnode_handle_put() en phy_device_release() para evitar la pérdida. Si es un nodo acpi, nunca se ha obtenido, pero se coloca en la ruta de error, por lo que se llama a fwnode_handle_get() antes de phy_device_register() para mantener equilibrada la operación de obtención/colocación.",
      },
   ],
   id: "CVE-2022-49016",
   lastModified: "2024-10-24T18:35:01.597",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 5.5,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.8,
            impactScore: 3.6,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-10-21T20:15:12.840",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-401",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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